Are these all yours ?   Yes , they are .   Cash or credit card ?   I want to use these coupons . Have they expired ?   Not yet . Oh , Madam , this item is no longer on sale , and this goes on sale tomorrow . Will you take them ?   Yes , could you use plastic bags ?   Sure , it is 80 yuan in all and you have to give me another coupon .   Could you charge it to my credit card ?   Certainly .   Here you are .   Okay . Input your pin number , please . Sign here .   Sure .   Here's your receipt .   Thank you . 